OF CONCHOLOGY. 127 



usually a small blue patch on the umbilical callus. The shell is 

 distinguishable from the sharp-ribbed specimens of costatum by 

 the more pointed apex, stronger carina and less rounded aper- 

 ture. Found from Sitka to San Diego, Cal. 



Calliostoma gloriosum, n. s. 



Shell six-whorled, acute, whorls gently rounded, with fine, re- 

 volving, thread-like ribs ; four or five ribs near the suture granu- 

 lated. Last whorl roundly carinated, base flattened, with about 

 twenty-five revolving stride. Columella thick, not reflected, but 

 base somewhat grooved or depressed behind it. Aperture about 

 one-third of the length of the whole shell, rhomboidal, pearly, 

 smooth. Shell of a beautiful light salmon color, ornamented 

 near the suture and carina with alternate patches of light yellow 

 and chestnut brown. 



Alt. 1*1 ; maj. diam. -9 in. ; defl. 62° ; angle of carina, 98°. 



Habitat. — Soquel, north side of Monterey Bay, one large 

 specimen, dead. Two fine adult perfect specimens were obtained 

 and kindly presented to me by Mrs. Dr. Blankman, of Monterey, 

 and were from that locality. 



This elegant species was first referred by me to the Callios- 

 toma supragranosum, of Carpenter, on account of the granulated 

 sutural ribs. That species was described from very young shells, 

 and no typical authentic specimens were at that time in Cali- 

 fornia. Upon comparing the young of gloriosum with the type 

 specimen of supragranosvm, in the Smithsonian Collection, it 

 was at once evident that they were quite distinct. Several of 

 the Californian species have the sutural ribs more or less granu- 

 lated, especially in young specimens. The nucleus of gloriosum 

 is, however, very much larger than that of supragranosum. The 

 adult of the latter has five whorls, with a major diameter of "42 

 and a total length of "38 in. The whorls have a peculiar in- 

 flated appearance and are not carinated. The last whorl loses 

 the painting of brown and white and is of a dull brown, slightly 

 concave above near the suture, with a deep chink, not a fissure, 

 behind the umbilical fissure. The brown and yellow painting is 

 very conspicuous on young specimens of gloriosum. 



Margarita pupilla, Gld. 



Margarita colostoma^ A. Ad. 



Margarita var. salmonea, Cpr., Proc. Cal. Acad. iii. 1866. 



Margarita inflata, Cpr., Proc. Phil. Acad. Sci. p. 62, 1865. 



The typical specimen of M. inflata differs from M. pupilla 

 (with which Dr. Carpenter drew no comparisons in his descrip. 



